ronis

From Proto-Baltic*ruon-, probably from Proto-Indo-European*rew-, *row- ‎(“to run, to rush, to hurry”) with an extra n. The meaning evolution was probably: “run, hurry (together)” > “to be in a group, herd”, “to be fecund, to be fertile, to rut; to be cheerful, neat” > “neat, cheerful, fertile animal living in groups” > “seal.” Cognates include Lithuanianrúonis.[1]